	@media screen and (min-width:1200px) {
	  html {
	    font-size: 20px;
	  }
	}

	@media screen and (min-width:800px) and (max-width:1200px) {
	  html {
	    font-size: 16px;
	  }
	}

	@media screen and (max-width:800px) {
	  html {
	    font-size: 12px;
	  }
	}

	* {
	  margin: 0;
	  padding: 0;
	  box-sizing: border-box;
	}

	html,
	body {
	  width: 100%;
	  height: 100%;
	  font-family: '楷体';
	}

	div {
	  width: 60rem;
	  min-height: 11.5rem;
	  margin: 2rem auto;
	  position: relative;
	}

	ul {
	  width: 60rem;
	  height: 4rem;
	  margin-bottom: 0;
	  border: 0.1rem solid black;
	  list-style: none;
	  overflow: hidden;
	  background-color: black;
	  color: white;
	}

	ul li {
	  float: left;
	  width: 8rem;
	  height: 4rem;
	  text-align: center;
	  line-height: 4rem;
	  cursor: pointer;
	  border-right: 0.05rem solid white;
	}

	ul li:nth-child(4) {
	  float: right;
	  width: 4rem;
	  height: 4rem;
	  margin-top: 0.5rem;
	  border: 0;
	}

	ul li:nth-child(4):hover {
	  background-color: black;
	}

	ul li .icon {
	  display: block;
	  width: 2rem;
	  height: 0.25rem;
	  background-color: white;
	  margin: 0.5rem;
	}

	ul li:hover {
	  background-color: rgba(255, 0, 0, .5);
	}

	p {
	  width: 60rem;
	  min-height: 7.5rem;
	  border: 0.05rem solid black;
	  padding: 1rem 2rem;
	  position: absolute;
	  top: 4rem;
	  left: 0;
	}

	p .close {
	  float: right;
	  cursor: pointer;
	  font-size: 1rem;
	}

	p .close:hover {
	  color: red;
	}

	p>strong {
	  color: #409EFF;
	}

	.spanItem {
	  display: block;
	  height: 1rem;
	  line-height: 1rem;
	  color: #67C23A;
	}